Organic light emitting diode display and method for manufacturing the same

Abstract

Disclosed are an organic light emitting diode display and a method for manufacturing the same. The organic light emitting diode display includes: a driving switching element; a pixel electrode connected with the driving switching element; an auxiliary electrode separated from the pixel electrode and positioned in a same layer as the pixel electrode; an organic common layer positioned on the pixel electrode and the auxiliary electrode and including a contact hole positioned on the auxiliary electrode; and a common electrode positioned on the organic common layer and connected with the auxiliary electrode through the contact hole; and the auxiliary electrode includes a light absorbing layer.

What is claimed is: 
     
         1 . An organic light emitting diode display, comprising:
 a driving switching element;   a pixel electrode connected with the driving switching element;   an auxiliary electrode separated from the pixel electrode and positioned in a same layer as the pixel electrode;   an organic common layer positioned on the pixel electrode and the auxiliary electrode and including a contact hole positioned on the auxiliary electrode; and   a common electrode positioned on the organic common layer and connected with the auxiliary electrode through the contact hole,   wherein the auxiliary electrode includes a light absorbing layer.   
     
     
         2 . The organic light emitting diode display of  claim 1 , wherein:
 the light absorbing layer has a light absorbing ratio of approximately 70% or more.   
     
     
         3 . The organic light emitting diode display of  claim 2 , wherein:
 the light absorbing layer comprises at least one metal including molybdenum (Mo), chromium (Cr), tungsten (W), and nickel (Ni).   
     
     
         4 . The organic light emitting diode display of  claim 1 , wherein:
 the pixel electrode includes the light absorbing layer.   
     
     
         5 . The organic light emitting diode display of  claim 4 , wherein:
 the auxiliary electrode and the pixel electrode each includes a lower layer, the light absorbing layer, a reflective layer, and an upper layer which are sequentially disposed from a bottom.   
     
     
         6 . The organic light emitting diode display of  claim 4 , wherein:
 the auxiliary electrode and the pixel electrode each includes the light absorbing layer, a lower layer, a reflective layer, and an upper layer which are sequentially disposed from a bottom.   
     
     
         7 . The organic light emitting diode display of  claim 1 , wherein:
 the pixel electrode does not include the light absorbing layer.   
     
     
         8 . The organic light emitting diode display of  claim 7 , wherein:
 the auxiliary electrode includes a lower layer, a reflective layer, an upper layer, and the light absorbing layer which are sequentially disposed from a bottom, and   the pixel electrode includes the lower layer, the reflective layer, and the upper layer which are sequentially disposed from the bottom.   
     
     
         9 . The organic light emitting diode display of  claim 7 , wherein:
 the auxiliary electrode includes the light absorbing layer, a lower layer, a reflective layer, and an upper layer which are sequentially disposed from a bottom, and   the pixel electrode includes the lower layer, the reflective layer, and the upper layer which are sequentially disposed from the bottom.   
     
     
         10 . A method for manufacturing an organic light emitting diode display, the method comprising:
 forming a pixel electrode and an auxiliary electrode each including a light absorbing layer on a substrate;   forming an organic common layer on the pixel electrode and the auxiliary electrode;   locating a first optical mask below the substrate, the first optical mask including a light transmitting portion corresponding to the auxiliary electrode and a non-light transmitting portion corresponding to the pixel electrode; and   removing a portion of the organic common layer positioned on the auxiliary electrode by irradiating light through the first optical mask.   
     
     
         11 . The method for manufacturing an organic light emitting diode display of  claim 10 , wherein:
 the forming of the pixel electrode and the auxiliary electrode includes light exposing through a second optical mask.   
     
     
         12 . The method for manufacturing an organic light emitting diode display of  claim 11 , wherein:
 the forming of the pixel electrode and the auxiliary electrode includes sequentially depositing a lower layer, a light absorbing layer, a reflective layer, and an upper layer on the substrate and then patterning the deposited layers by using the second optical mask.   
     
     
         13 . The method for manufacturing an organic light emitting diode display of  claim 11 , wherein:
 the forming of the pixel electrode and the auxiliary electrode includes sequentially depositing a light absorbing layer, a lower layer, a reflective layer, and an upper layer on the substrate and then patterning the deposited layers by using the second optical mask.   
     
     
         14 . The method for manufacturing an organic light emitting diode display of  claim 10 , wherein:
 the light absorbing layer includes at least one metal including molybdenum (Mo), chromium (Cr), tungsten (W), and nickel (Ni).   
     
     
         15 . A method for manufacturing an organic light emitting diode display, the method comprising:
 forming a pixel electrode, and an auxiliary electrode including a light absorbing layer on a substrate;   forming an organic common layer on the pixel electrode and the auxiliary electrode; and   removing a portion of the organic common layer positioned on the auxiliary electrode by irradiating light to the auxiliary electrode.   
     
     
         16 . The method for manufacturing an organic light emitting diode display of  claim 15 , wherein:
 the forming of the pixel electrode and the auxiliary electrode includes light exposing using two or more optical masks.   
     
     
         17 . The method for manufacturing an organic light emitting diode display of  claim 16 , wherein:
 the forming of the pixel electrode and the auxiliary electrode includes   sequentially depositing and patterning a lower layer, a reflective layer, and an upper layer on the substrate to form the pixel electrode and a part of the auxiliary electrode, and   depositing and patterning a light absorbing layer on the part of the auxiliary electrode to form the auxiliary electrode.   
     
     
         18 . The method for manufacturing an organic light emitting diode display of  claim 17 , wherein:
 the removing of the portion of the organic common layer positioned on the auxiliary electrode includes irradiating light from a side above the substrate.   
     
     
         19 . The method for manufacturing an organic light emitting diode display of  claim 16 , wherein:
 the forming of the pixel electrode and the auxiliary electrode includes   depositing and patterning a light absorbing layer on the substrate to forming a part of the auxiliary electrode, and   sequentially depositing and patterning a lower layer, a reflective layer, and an upper layer on the substrate and the light absorbing layer to form the pixel electrode and the auxiliary electrode.   
     
     
         20 . The method for manufacturing an organic light emitting diode display of  claim 19 , wherein:
 the removing of the portion of the organic common layer positioned on the auxiliary electrode includes irradiating light from a side below the substrate